The Global Wave Ensemble System (GWES) is now unified with the Global
Ensemble Forecast System (GEFS). The WAVEWATCH III wave model is
one-way coupled with the atmospheric forecast model. This allows for
an increase in frequency of the wind forcing from 3 hours to 1 hour.
This unified system has 30 members and the wave model is initialized
with the previous member's 6 hour forecast. The wave model has a
spatial resolution of 0.25 x 0.25 degrees. The system runs four cycles
per day (00, 06, 12 and 18Z). The wave forecast has been extended from
10 to 16 days.
More information on the GEFS system is available
Access the Global Ensemble Forecast System -- Wave product viewer
The US National Weather Service also generates operationally a combined wave-height
ensemble product in partnership with the Fleet Numerical Meteorology and Oceanography
Center (FNMOC) of the US Navy. The combined wave ensemble data are at the NFCENS page.